mysql主从复制

Posted 2021-03-04 苍山落暮

1.mysql安装

yum install -y mysql mysql-devel mysql-server mydql-libs

2.修改mysql配置文件

//先备份
cp /etc/my.cnf /etc/my.cnf.bak

vim /etc/my.cnf  
[mysqld]
datadir=/data/mysql
socket=/var/lib/mysql/mysql.sock
user=mysql
symbolic-links=0
log-bin=mysql-bin
server-id=1
auto_increment_offset=1
auto_increment_increment=2
[mysql_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
replicate-do-db=all

3.创建目录

mkdir -p /data/mysql
chown -R mysql:mysql /data/mysql

4.重启mysql

/etc/init.d/mysqld restart

5.修改slave mysql中的my.cnf

与master的文件一致，只需修改：
server-id=2
auto_increment_offset=2

[mysql_safe]
master-host=192.168.33.10
master-user=zhangsan
master-pass=123456
master-port=3306
master-connect-retry=60

修改完成后，同样需要执行3、4步骤

6.master上执行授权

grant replication slave on *.* to 'zhangsan'@'%' identified by '123456';
show master status

7.slave上指定主服务器

mysql> change master to master_host='192.168.33.10',master_user='zhangsan',master_password='123456',master_log_file='mysql-bin.0000006',master_log_pos=98;

说明：master_log_file，master_log_pos 这两个参数的值，可以通过show master status查看。

mysql> slave start

mysql> show slave statusG

说明：如果以下两个值为yes，表明连接正常，等待同步。

slave_IO_Running:Yes
Slave_SQL_Running:Yes